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Goodwill and Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended9 Months Ended
Sep. 30, 2010
Sep. 30, 2011
Unit
Sep. 30, 2010
Goodwill and Intangible Assets Disclosure [Abstract]   
Number of reporting units 52 
Intangible asset impairment charges$ 1,006$ 0$ 1,006